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| Registros recuperados: 68 | |
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| Mosaad, Ibrahim S; Khafagy, El-Hosiny E; Seada, Ali K. |
| To study the effect of organic fertilization as compost (20 m3 fed-1), mineral Zinc-Nitrogen fertilization mixture (three Zinc levels (0, 8 and 16 kg Zn fed-1) and three nitrogen rates (0, 30 and 60 kg N fed-1 were mixed alternately) on growth, grain and straw yields, N, P and K uptake for rice crop (Oryza sativa), variety Giza 178, two field trials at El-Serw Agricultural Research Station, Damietta governorate were conducted through summer seasons of 2015 and 2016. Plant height, dry matter, grain and straw yields also, N, P and K-uptake in grain and straw yields increased with increasing levels of zinc and nitrogen fertilization. Moreover, use organic fertilization as compost gave the highest values of the previous parameters. Applying of 16 kg Zn fed-1 +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rice; Zinc; Compost; Organic matter; Uptake; Nitrogen; Fertilization. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4647 |
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| Abril,Adriana. |
| Se evaluó la eficiencia de prácticas de manejo de hábitat y microorganismos para degradar efluentes en una industria metalúrgica de Córdoba, Argentina. Para optimizar la actividad de organismos del agua, el suelo y la rizosfera de las plantas, se manejaron tres hábitats: acuático, de humedales y agrícola. Las prácticas fueron: introducción de vegetación palustre y terrestre, aireación del agua, laboreos, remoción de sedimentos e inoculación con bacterias seleccionadas. Se evaluaron los siguientes parámetros: pH y contenido de bacterias en el agua, y contenido de aceites, Cr y Zn en los sedimentos, suelo y napa freática. El pH registrado fue siempre muy elevado (entre 8.4 y 10.9), mientras que la cantidad de bacterias descomponedoras aumentó hasta valores... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cromo; Zinc; Aceites minerales; Bioremediación; Fitoremediación. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2005000100002 |
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| Sakulsak,Natthiya. |
| Metallothionein (MT) is a ubiquitous protein with a low molecular weight of 6-7 kDa weight and it was first identified in the kidney cortex of equines as a cadmium (Cd)-binding protein responsible for the natural accumulation of Cd in the tissue. The mammalian MT contains 61 to 68 amino acid residues, in which 18 to 23 cysteine residues are present. The expression of MT starts by binding of metal transcription factor-1 (MTF-1) to the regulative region of MT gene called metal responsive elements (MREs). The induction of MT through the MREs region can be initiated by several metal ions such as zinc (Zn), copper (Cu) and Cd. However, Zn is the only heavy metal which can reversibly and directly activate the DNA-binding activity of MTF-1. In mammals four types... |
| Tipo: Journal article |
Palavras-chave: Metallothionein; Cadmium; Zinc. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300039 |
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| Tabaldi,Luciane Almeri; Castro,Gabriel Y; Cargnelutti,Denise; Skrebsky,Etiane Caldeira; Gonçalves,Jamile Fabbrin; Rauber,Renata; Rossato,Liana; Schetinger,Maria Rosa Chitolina; Bisognin,Dílson Antônio; Nicoloso,Fernando Teixeira. |
| The objective of this study was to evaluate the effects of aluminum (Al) on the zinc (Zn), manganese (Mn), iron (Fe) and copper (Cu) concentrations in four potato clones (Macaca and Dakota Rose: both Al-sensitive clones; and SMIC148-A and Solanum microdontum: both Al-tolerant-clones), grown in a nutrient solution (pH 4.00) with 0, 50, 100, 150 and 200mg Al L-1. Root Zn and Fe concentrations decreased linearly with the increase of Al levels in Macaca, SMIC148-A and Dakota Rose and increased linearly in S. microdontum. Shoot Zn concentration showed a quadratic relationship with Al in S. microdontum and SMIC148-A, but a curvilinear response in Dakota Rose. Shoot Fe concentration showed a quadratic relationship with Al in S. microdontum, SMIC148-A and Dakota... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Solanum microdontum; Zinc; Manganese; Iron; Copper. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000200010 |
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| Hamani,C.; Paulo,I. de; Mello,L.E.A.M.. |
| The thalamus is an important modulator of seizures and is severely affected in cholinergic models of epilepsy. In the present study, chronically epileptic rats had their brains processed for neo-Timm and acetylcholinesterase two months after the induction of status epilepticus with pilocarpine. Both controls and pilocarpine-treated animals presented neo-Timm staining in the anterodorsal nucleus, laterodorsal nucleus, reticular nucleus, most intralaminar nuclei, nucleus reuniens, and rhomboid nucleus of the thalamus, as well as in the zona incerta. The intensity of neo-Timm staining was similar in control and pilocarpine-treated rats, except for the nucleus reuniens and the rhomboid nucleus, which had a lower intensity of staining in the epileptic group. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epilepsy; Pilocarpine; Zinc; Sprouting; Nucleus reuniens; Midline thalamus. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001100016 |
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| Gaulke,Linda S.; Henry,Charles L.; Brown,Sally L.. |
| Forest application of biosolids offers a potential environmentally friendly alternative to landfilling. This two-year investigation was designed to analyze the effects of elevated soil metal concentration resulting from the land application of biosolids on the symbiotic, nitrogen (N) fixing relationship between Alnus rubra Bong. (red alder) and Frankia. High metal biosolids and a modern-day composted biosolid applied at high loading rates of 250, 500, and 1000 Mg ha-1, were used to represent a worst-case scenario for metal contamination. The high metal biosolids were obtained before the current regulations were formulated and had been lagooned prior to use in this study. Total cadmium (Cd), lead (Pb) and zinc (Zn) in the high metal biosolids were 45, 958,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Frankia; Cadmium; Lead; Zinc. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000400006 |
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| Zoufan,Parzhak; Karimiafshar,Amer; Shokati,Sara; Hassibi,Payman; Rastegarzadeh,Saadat. |
| ABSTRACT Present study was carried out to investigate the effects of different Zn concentrations on growth and some antioxidant responses in Chenopodium murale L. The seeds were sown on the pots. 45-day plants were transferred to hydroponic solution containing 0.2 (control), 150, 300 and 600 µM Zn. The plants were harvested at 6 days after applying Zn treatments and some parameters were evaluated including plant length, fresh weight, photosynthetic pigments, malondialdehyde (MDA), ascorbate, proline and enzymatic antioxidants such as catalase (CAT), guaiacol peroxidase (GPX) and superoxide dismutase (SOD). Zn concentration showed a considerable increase in the shoot and root as the concentration of Zn increased in the medium, meanwhile the roots were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbate; Enzymatic antioxidant; Lipid peroxidation; Proline; Zinc. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100418 |
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| Silva,Aderbal M. de A; Bezerra,Leilson R; Rufino,Sara R. M; Filho,José M. Pereira; Freire,Juliana M; da Silva,Divan S; Oliveira,Ronaldo L; Bayão,Geraldo F. V. |
| For confined animals, performance is improved when their diet is supplemented with a mineral mixture and protein energy. This study evaluated the effect of dietary supplementation on feedlot sheep on native pasture. Two experiments were conducted in sequence, with the animals constrained in one and animals confined to pasture in the other. The experiments were conducted with 32 Santa Ines lambs, with average initial weights of 16.8 and 19.9 kg for the constrained and pasture studies, respectively. In both experiments, the animals were offered the following supplements: Supplement 1 = 200 g of the concentrate without mineral mixture; Supplement 2 = 200 g of the concentrate with mineral mixture + Mn + Zn; Supplement 3 = 300 g of the concentrate with mineral... |
| Tipo: Journal article |
Palavras-chave: Dry matter; Feed conversion; Manganese; Ovine; Zinc. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300001 |
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| Feliu,María Susana; Vidueiros,Silvina Mariela; Piñeiro,Adriana; López,Clara; Slobodianik,Nora Haydée. |
| Se estudiaron 19 niños entre 1 y 36 meses de vida, internados en la Unidad de Cuidados Intensivos Pediátricos (UCIP) del Hospital "Dr. Pedro de Elizalde". Las muestras de sangre fueron extraídas en ayunas, al ingreso en UCIP. Se determinó la concentración de proteína C reactiva (PCR) -por inmunodifusión radial cuantitativa-, cobre (Cu) y zinc (Zn) -por absorción atómica-, calculándose la relación Cu/Zn. Como valores de referencia (VR) se utilizaron los reportados por la bibliografía para el mismo grupo etario. Los resultados expresados como rangos fueron: PCR: 0,2-7,0 mg/dL; Cu: 0,4-2,2 µg/mL; Zn: 0,3-2,7 µg/mL; Cu/Zn: 0,3-2,1. VR: PCR: < 0,8 mg /dL; Cu: 0,8-1,5 µg/mL; Zn: 0,65-1,4 µg/mL; Cu/Zn < 1. Los hallazgos preliminares muestran que el 63% de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cobre; Zinc; Proteína C reactiva; Niños; Estado nutricional. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0325-29572006000200011 |
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| Marchi,Giuliano; Guelfi-Silva,Douglas Ramos; Malaquias,Juaci Vitória; Guilherme,Luiz Roberto Guimarães; Spehar,Carlos Roberto; Martins,Eder de Souza. |
| Abstract: The objective of this work was to evaluate the solubility of the micronutrients copper, nickel, and zinc, chemically extracted from silicate agrominerals, as alternative sources of potassium for lettuce (Lactuca sativa) and rice (Oryza sativa) cultures, as well as their availability to the plants. The micronutrient contents of five agrominerals (alkaline ultramafic, biotite schist, volcanic breccia, phlogopite schist, and mining by-product from Chapada) were evaluated, after being extracted by the citric acid, hydrochloric acid, diethylenetriaminepentaacetic acid, 3051A, neutral ammonium citrate, and Mehlich-3 methods. The agrominerals, at the doses of 0 (control), 200, 400, and 600 kg ha-1 K, were mixed to soil where lettuce and rice were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copper; Mining by-product; Nickel; Nutrient availability; Zinc. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2020000100600 |
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| Deliberalli,Wanessa; Cansian,Rogério L.; Pereira,Albanin A. M.; Loureiro,Rafael C.; Hepp,Luiz U.; Restello,Rozane M.. |
| ABSTRACT Streams in urban areas are strongly impacted by the input of organic matter and metals, for instance copper (Cu) and zinc (Zn). These metals are essential for the aquatic biota, but when absorbed in excess they are toxic. In Chiro nomidae larvae, the deleterious effects of heavy metals can be ascertained by analyzing the morphological deformities of the larval mentum, a structure of the oral cavity. In this study, we evaluated I) the bioavailability of Cu and Zn in urban stream sediments and II) the relationship between Cu and Zn concentrations and the incidence of deformities in the mentum of Chironomus larvae. Chironomid flies were collected from four locations in two streams at an urban area in southern Brazil. They were identified and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomonitoring; Copper; Environmental quality; Mentum; Zinc. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100316 |
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| LOPEZ-GARCIA,CARLOS; MOLOWNY,ASUNCION; NACHER,JUAN; PONSODA,XAVIER; SANCHO-BIELSA,FRANCISCO; ALONSO-LLOSA,GREGORI. |
| The medial cerebral cortex of lizards, an area homologous to the hippocampal fascia dentata, shows delayed postnatal neurogenesis, i.e., cells in the medial cortex ependyma proliferate and give rise to immature neurons, which migrate to the cell layer. There, recruited neurons differentiate and give rise to zinc containing axons directed to the rest of cortical areas, thus resulting in a continuous growth of the medial cortex and its zinc-enriched axonal projection. This happens along the lizard life span, even in adult lizards, thus allowing one of their most important characteristics: neuronal regeneration. Experiments in our laboratory have shown that chemical lesion of the medial cortex (affecting up to 95% of its neurons) results in a cascade of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Medial cortex; Hippocampus; Postnatal neurogenesis; Neural stem cells; Zinc; Regeneration. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000100006 |
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| Araújo,Marcos Jácome de; Medeiros,Ariosvaldo Nunes de; Teixeira,Izabelle Auxiliadora Molina de Almeida; Costa,Roberto Germano; Marques,Carlo Aldrovandi Torreão; Resende,Kléber Tomás de; Melo,Gabriel Maurício Peruca de. |
| ABSTRACT A comparative slaughter trial was conducted to estimate the body composition and net requirements of Cu, Zn, Mn, Fe, and Co for growth of castrated Moxotó goat kids, with15.69±0.78 kg initial body weight (BW), grazing in the semiarid region of Brazil. The baseline group consisted of four randomly selected kids (15.37±0.30 kg BW). Thirty-two kids were randomly allocated into eight groups (considered as block), distributed among four levels of concentrate supplementation (0, 0.5, 1.0, and 1.5% BW). Animals in a group were slaughtered when the 1.5% BW treatment kids in the group reached approximately 25 kg BW. The trace element content (mg/kg of empty body weight) ranged from 23.68 to 27.81 mg Zn, 35.70 to 47.29 mg Fe, 0.86 to 1.09 mg Mn, 1.45 to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Factorial method; Micro mineral; Zinc. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300231 |
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| Sara Farías,Silvia; Menéndez,Ana María; Pontiggia,Rodrigo Martín; Servant,Roberto Enrique; Cortez,Iris; Pita Martín de Portela,María Luz. |
| Se describe la validación de un método para la determinación de manganeso, molibdeno y zinc, a niveles traza, en soluciones acuosas, mediante espectroscopia de emisión-plasma inductivo de argón. Se optimizó y validó la cuantificación de manganeso, molibdeno y zinc en solución acuosa ácida usando un espectrómetro de emisión atómica de plasma inductivo. Se determinaron: selectividad/especificidad, linealidad, repetibilidad y precisión intermedia utilizando materiales de referencia, y sesgo contrastando contra material de referencia certificado de matriz. Las longitudes de onda (nm) seleccionadas fueron: Zn 213.857, Mn 257.610 y Mo 202.031, las cuales permitieron discriminar interferencias espectrales. Se probó la linealidad de las funciones respuesta... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Validación; Manganeso; Molibdeno; Zinc; Plasma de acoplamiento inductivo. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0325-29572016000400011 |
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| Feliu,María Susana; Piñeiro,Adriana; López,Clara; Slobodianik,Nora Haydée. |
| Desde el punto de vista nutricional es necesario conocer la concentración sérica de algunos minerales en niños y para poder interpretar los resultados es imprescindible comparar con valores de referencia. El objetivo de este trabajo es determinar valores de referencia de cobre, zinc y selenio en suero de niños. Se utilizaron muestras de suero de niños de ambos sexos (n = 42) clínicamente sanos, elegidos al azar, entre 1 mes y 12 años de edad, concurrentes para control al Servicio de Pediatría del Hospital de Clínicas "José de San Martín", Ciudad Autónoma de Buenos Aires. Los niveles de zinc (Zn), cobre (Cu) y selenio (Se) se determinaron en suero libre de hemólisis por espectrofotometría de absorción atómica. Los resultados fueron: cobre: 0,78 - 2,51... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cobre; Zinc; Selenio; Valores de referencia; Niños. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0325-29572005000400007 |
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| Registros recuperados: 68 | |
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